1. It is said that this is an illness that can result in total blindness ________ left untreated.
A. after B. if C. since D. unless
2. ― Dear me! I’ve been in
― ________ you are settled, why don’t you take up some serious study?
A. If B. After C. Now that D. Even if
3. ________ international commerce grows, there is an amazing development which is expanding at ever-increasing rate-business on the internet.
A. As B. Since C. With D. While
4. Please take a hat with you ________ the sun is very hot.
A. in the case B. in case C. in case of D. in the case of
5. You may borrow this book________ you promise to give it back.
A. as if B. unless C. as long as D. even if
6. It must have rained last night, ________ the roads are wet this morning.
A. as B. for C. because D. since
7. Look! It’s cloudy. Take an umbrella________ you regret it.
A. or B. and C. after D. before
8. ―I’ve made up my mind to go abroad next year. What about you, darling?
―Well, ________ you’re going, so will I.
A. if B. since C. whether D. as long as
9. The animal was walking________ it had hurt its leg.
A. as B. even though C. like D. as though
10. The boy is very clever. It seems that he can answer the question________.
A. however hard is it B. however it is hard C. however is it hard D. however hard it is
11. ________the Internet is bringing the distance between people, it may also be breaking some home or will cause other family problems.
A. When B. While C. If D. As
12. I didn’t make great progress in my English study ________ my teacher had given me some advice on how to learn the language well.
A. unless B. before C. until D. when
13. Not that I’m unwilling to go to see the film with you, ________ I have to do my homework now.
A. because B. but C. but that D. however
14. ________ one loses self-confidence, he can never expect to be successful.
A. Once B. As C. Unless D. While
15. It was ________ lovely a day ________ we were all feeling happy and cheerful.
A. so; that B. such; that C. so as; that D. such; as
16. They teach ________ their pupils are working.
A. wherever B. whatever C. whichever D. whoever
17. Hardworking ________ he was, he had never had enough money to pay the bills.
A. as B. because C. although D. for
18. I am at least ________ age ________ your sister if I am not older than she.
A. the same; as B. the same; with C. as same; as D. as same; with
[答案与解析]
1. B。if left untreated可看作是条件状语从句if it is left untreated 的省略。句意为“据说这种疾病如果不治，会导致完全看不见。”
2. C。根据上句“天啊！我来美国已经三星期多了。”可推知下句“既然你已安顿下来，为什么不开始认真学习呢？”now that意为“既然”符合句意。故答案为B。
3. A。句意为“随着国际商务的扩大，因特网上的业务正日益加速取得了惊人的发展。”as意为“随着”，引导从句；with为介词，意为“随着”,但不能引导从句。
4. B。in case of意为“如果；万一”，如：In case of rain they can't go. 万一下雨，他们就不能去了。in case意为“以防；可能；倘若”；句意为“倘若太阳很利害，你就把帽子戴上。”
5. C。as long as 表示条件，意为“只要”。句意为“只要你答应归还，你就可以把这书借走。”
6. B。for是并列连词，表示的原因往往是按照逻辑推断出来的。后一分句“今天早上路上是潮湿的”是为前一分句中做出的判断“昨晚准是下雨了”进行解释，而不是造成这一判断的直接原因，故答案为B。
7. D。句意为“看！阴天了。带上雨伞以免后悔。”before意为“在...之前”，从句中的谓语动词用一般现在时表示将来时间。
8. B。根据上句“亲爱的，我已决定明年出国，你呢？”可知已做出决定，因此可推知答语“既然你要去，我也去。”if表示假设的条件，as long as表充分条件,whether不引导条件状语从句, since意为“既然；因为”，符合句意。又如：Since you ask, I will tell you. 你既然问，我就告诉你。
9. D。句意为“这动物走路的样子好像伤了腿似的。” 连词as though= as if, 引导方式状语从句，意为“好像”。
10. D。however=no matter how, 引导让步状语从句，意为“无论…”。语序为：however+ 形容词或副词+ 陈述句。句意为“男孩子很聪明。好像不管问题有多难他都能回答。”
11. B。when, while, as这三个词都可以引出时间状语从句，它们的区别是：when 从句表示某时刻或一段时间，谓语动词可以是延续性的也可以是非延续性的。while 只表示时间上的一个段，谓语动词是延续性的。while从句常用于进行时态，强调主从句的动作同时发生。 as意为“当...的时候 , 一边...一边”或表示进展过程，意为“随着”。 根据句意“因特网在拉近人们之间距离的同时，也可能破坏一些家庭或将引起别的家庭问题。”故答案为B。
12. C。本题考查not…until句型，意为“直到┅才”。句意为“直到老师告诉我关于如何学好语言的建议，我的英语学习才取得大的进步。”
13. C。本题是考查 (It is) not that…but that…句式，相当于It is not because…but because…，意为“不是因为┅而是因为┅”。句意为“不是因为我不愿和你一起去看电影，而是因为我现在必须做作业。”
14. A。once意为“一旦；一…就…”句意为“一个人一旦失去了自信心,就甭想获得成功。”
15. A。本题考查such…that和so…that句型结构区别。so+形容词+ a / an+ 单数名词=such + a / an+形容词+ 单数名词。句意为“天气如此好以至于我们大家都觉得愉快。”
16. A。本题考查地点状语从句。wherever意为“无论哪里，无论什么地方”。句意为“学生在哪里拍电视,教师们就在哪里上课。”又如：Wherever you go, I go too. 无论你到什么地方，我都去。
17. A。as引导的让步状语从句，意为“虽然, 尽管”，从句常用倒装语序，即把表语，状语或动词原形提到句首。句意为“尽管他工作挺辛苦，但却一直是入不敷出。”
18. A。本题考查比较状语从句。the same age as = as old as意为“和…一样大”。句意为“如果不比你姐姐大的话，我至少和她一样大。”